Q216 / 225 · JEE Main 2005 · Physics

A circuit has a resistance of $12 \Omega$ and an impedance of $15 \Omega$. The power factor of the circuit will be

Correct answer
A
0.8
B
0.4
C
1.25
D
0.125

Solution

$\cos \phi=\frac{R}{Z}=\frac{12}{15}=\frac{4}{5}=0.8$

Hence, the correct answer is option: 'A'.

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